Portable water heater



FIG. 1 is a perspective view of the portable water heater of the invention, showing the various operative components thereof;

FIG. 2 is a right side view of the portable water heater of FIG. 1;

FIG. 3 is an end view of the portable water heater of the invention;

FIG. 4 is an opposite end view of the portable water heater of the invention, similar to FIG. 3;

FIG. 5 is a left side view of the water heater of the invention; and,

FIG. 6 is a top view of the water heater of the invention. 

The ornamental design for the portable water heater, as shown and described. 